Clam-shell bucket.



J. MGMYLER.

PATENTBD FEB. 6, 1906.

CLAM SHELL BUCKET.

APPLIUATION FILED MAYZZ, 1905.

mx' @7W/fig@ J. MGMYLBR. @LAM SHELL BUGKET.

APPLICATION FILED MAY22. 1905.

PATENTED FEB. 6, 1906.

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Specification of Letters Patent.'

Patented Feb. 6, 1906.

Application filed May 22, 1905. Serial No. 261,546.

T0 @ZZ-whom it may concern,.-

Be it known that LJOHN MGMYLER, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Clam-Shell Buckets, of which the following isa full, clear, and exact description, reference being had to the accompanying drawings.

The clam-shell bucket embodying this invention, as shown in the drawings, was designed with a special reference for use in unloading ore from the holds of vessels; but obviously it is adapted for any analogous uses.

The invention consists of the various combinations of parts constituting the mechansim for suspending the bucket-jaws and for opening and closing them by the use of ropes or cables.

In the drawings, Figure l is a side elevation of the improved bucket. Fig. 2 is a plan view thereof.

\ The bucket-frame is made up of fo ur parallel vertical plates, which are held in fixed relationship by means of various transverse shafts and rods shown in the drawings. The two inside plates A are larger than the two outside plates B B. The two bucket-jaws are indicated by C C. rlhe power-wheel shaft D extends horizontally through all four of these plates and is capable of rotating in bearings which those plates supply. Suitable drums, as d d, are secured to this shaft. The opening-ropes F are wound upon the smaller drums, and the closing-rope H is wound upon the larger drum. Frein these drums the ropes pass upward in engagement with guide-sheaves J, J, and K.

Two levers E, having gearsegments e formed on their upper arms, are hung upon the transverse shaft e', and these gear-segments are in mesh, respectively, with the pinions G, secured u on the power-shaft D, wherefore the rotation of that shaft in either direction, by drawing upon` the ropes F and H, would cause the rocking in one direction or the other of these segment-levers. The lower arm e* of each segment-lever is pivotally connected with an upwardly-extended ear c at the rear end of the bucket-jaw C. Two bell-crank levers M are hung upon a transverse shaft m, which occupies a position at one end of the frame corresponding to the position occupied by the shaft e at the other end of the frame. One arm l. of each of these bell-crank levers extends down and is pivotally connected with an upwardly-eX- tended ear c at the rear of the bucket-J aw C. The arm m2 of each of these bell-crank levers is connected, by moans ol a link N, with the corresponding segment-lever E.

The :front end of each bucket-j aw is pivotally connected with two links P, one on each side thereof, and the two upper ends of these links are pivotally connected with the frame at points above the rear ends of the buckets and preferably outside of the vertical planes of the axes of the shafts e and m.

By drawing upward on the ropes F (the rope l-l being simultaneously slackened) the power-shaft D is turned in that direction which swings the gear-segments downward. This movement swings the rear end of the bucket-jaw C outward and upward. The bucketjaw C is simultaneously moved in like manner by the bell-crank levers M,which receive their motion from the segment-levers through the links N. The described movements of the rear ends of the two bucketjaws cause of necessity some movement of the front ends of said jaws,which movement is guided and determined by the links P. l/Vhen the jaws are opened, they and the connected parts described occupy the positions indicated by the dotted line in Fig. 1. When the operator pulls on the rope H and simultaneously slackens the ropes F, the described parts reverse their movement.

It will be noted. that the power to open and close both bucket-jaws is applied at their rear ends and is derived from the segment-levers. The links P transmit none of the power to move the jaws, but merely act as guides which compel the front ends of the bucketjaws to spread wide apart when the rear ends of said bucket-jaws are moved, as described. The result is when the bucket-jaws are opened they stand in substantially vertical positions. When they are closed, they first scrape the material together between them and then dig under said material and lill themselves with it as they pass to the substantial horizontal position they occupy when closed.v

I claim- 1. In a clam-shell bucket, the combination with the frame, and two bucket-jaws, of levers pivoted to opposite ends of said frame and having depending arms which are pivotally connected with the upper rear ends of the bucket-jaws, means for swinging said lever-arms to move their depending arms toward and from each other, and links P pivot- IOO IIO

ally connected with the upper front parts of said bucket-jaws and with the frame at points above the rear ends of said jaws.

2. In a clam-shell bucket, the combination with the frame, and two bucket-jaws, of levers pivotally connected with the said frame at opposite ends thereof and having depending arms which are respectively pivoted to the sides of the rear ends of said bucket-jaws, mechanism operating on the levers at one end of the frame to rock them back and forth, a link connecting the levers at one end of the frame with the levers at the other end oi the frame and transmitting motion from one to the other, and links P pivotally connected with the sides of the front ends of said jaws and with the frame at points above the rear end of said jaws.

3. In a clam-shell bucket, the combination with the frame, and two bucket-jaws, of the levers E E mounted in the frame at one end thereof, and having depending arms which are pivotally connected with the rear end of one bucket-jaw, the bell-crank levers M, M mounted in the frame at the other end thereof and having depending arms which are pivotally connected with the rear end of the other bucket-j aw, means transmitting motion from the irst-mentioned levers to said bell-crank levers, mechanism mounted in the frame for rocking the first-mentioned levers,

and links P pivotally connected with the Afront ends of said bucket-jaws and with the frame at points above the rear ends of said jaws.

4. with the frame, and two bucket-j aws, of gearsegments mounted on alined axes in one end of the bucket-frame and having depending arms which are pivotally connected with the rear end of one bucket-jaw, a power-shaft mounted in the frame and carrying pinions engaging said segments, bell-crank levers M M mounted on alined aXes in the other end of said frame and having depending arms which are pivotally connected with the rear end of the other bucket-j aw, links N connecting the horizontal arms of said bell-crank levers with the gear-segments, means for rotating the said power-shaft in either direction, and links P having their lower ends pivotally connected with the iront ends of the bucketjaws and having their upper ends pivotally connected with the frame at points above the rear ends of said bucket-jaws.

In a clam-shell bucket, the combination In testimony whereoi` I hereunto aflix my signature in the presence of two witnesses, JOHN MCMYLER.

Witnesses:

E. B. GiLonRrsT, E. L. THURsToN. 

